Vincent Van Gogh sold only one painting during his lifetime, for about $30. A sunflower still life he painted in 1888 sold for $39.85 million in 1988,, more than three times the highest price paid...

Vincent Van Gogh sold only one painting during his lifetime, for about $30. A sunflower still
life he painted in 1888 sold for $39.85 million in 1988,, more than three times the highest price
paid previously for any work of art. If this painting had been purchased for $30 in 1888 and sold
in 1988 for $39.85 million, what would have been the annual rate of return?